Semi Truck Repair Shop in Zion, IL — Truck & Diesel Repair Near You
Same-day repairs on most jobs · OEM parts · 3 minutes off I-94 · Mon–Fri 7am–5pm · Sat 7am–2pm
Full-Service Diesel Repair, One Shop
Semi trucks fail in predictable ways: engine performance loss, after-treatment (DPF/SCR/EGR) faults, electrical gremlins, worn suspension components, and brake wear. Our techs work on Class 6-8 trucks across all of these systems, in bays sized for full tractors, at our Zion, IL shop, just off Route 173 near I-94.
Diesel Mechanic & Truck Mechanic Near Me in Zion, IL
Looking for a diesel mechanic near you? RT Group is a real truck repair shop at 700 Trumpet Pk Dr, Zion, IL — not a call center or dispatch network. Your truck is diagnosed and repaired in our own bays by our own diesel techs.
- Diesel engine diagnostics — check engine lights, derates, power loss, hard starts
- After-treatment repair — DPF, SCR and EGR faults
- Electrical — wiring, sensors, charging and starting systems
- Brakes and suspension — air brakes and suspension components on Class 6–8 trucks
Open Mon–Fri 7 AM–5 PM and Sat 7 AM–2 PM. Call (224) 588-3442, tell us the symptom or fault codes, and we’ll tell you when we can get your truck into a bay.
Truck Repair Shop Near Me? We’re 3 Minutes Off I-94
If you searched for a truck mechanic, diesel mechanic or truck repair shop near me between Kenosha and Waukegan, our Zion, IL shop is close by: 700 Trumpet Pk Dr, Zion, IL 60099, near Route 173, about 3 minutes from I-94 and right by US-41 (Skokie Hwy).
- Illinois: Zion, Winthrop Harbor, Beach Park, Waukegan, Gurnee, North Chicago
- Wisconsin: Pleasant Prairie, Kenosha
- Routes: I-94, US-41, IL-173
Call ahead and we’ll tell you when we can get your truck into a bay. If the truck can’t move, see our mobile truck repair service.
Commercial Truck Repair for Owner-Operators and Fleets
We repair Class 6–8 commercial trucks: semi tractors, straight trucks and box trucks, for owner-operators and local fleets. Diesel repair covers engine performance, after-treatment, electrical, suspension and brakes. For specific makes, see truck brands we repair.
What We Repair
- Diesel engine repair and performance diagnostics
- After-treatment system repair (DPF, SCR, EGR)
- Electrical system and wiring harness repair
- Suspension component repair and replacement
- Brake system service (air and hydraulic)
Our Process
- Diagnose — we identify the root cause, not just the symptom.
- Quote — you get a straight number before any work starts.
- Fix — heavy-duty repair parts selected for the job, installed in our bays.
- Road — back on I-94 with the issue actually resolved.
Built for Drivers Who Can't Afford Downtime
Truck and trailer repair at 700 Trumpet Pk Dr, close to I-94 and US-41.
We find the actual cause before giving you a number.
Parts are selected to match the repair and application.
Most shops punt these jobs elsewhere — we don't.
See the Shop
Real work from our bays in Zion, IL.
4.9★ from 360+ Google Reviews
“I’ve been to a lot of shops, and RT Group is one of the few that actually does what they say. Rolled in with an issue on my trailer — no lights, busted wire. They got me in quick, showed me exactly what was wrong, and had it fixed that same day.”
“Brought my Freightliner Cascadia to RT Group after an air leak and brake issues. The mechanics found the problem quickly, explained what needed to be repaired, and got the truck back on the road the same day. No guessing, no unnecessary work, no surprise charges.”
“Great people working. Very professional and do quality work. We came in for some electrical issues on the trailer after another road service made a big mess there. They found the problem and fixed it quickly. Highly recommend this place.”
Common Questions
How far off I-94 is RT Group?
Do you work on all truck makes?
Can you diagnose a check-engine light or after-treatment fault?
Do I need an appointment?
Can you handle a full fleet inspection or PM cycle?
Is there a diesel mechanic near me open on Saturday?
Do you do commercial truck repair for fleets?
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Call now to talk to a live person, or request a quote and we'll follow up fast.